HYDROXYNAPHTHOL BLUE Chemical Properties

storage temp. 

Store at +15°C to +30°C.

solubility 

340g/l

form 

Solid

color 

Dark Gray

PH

2-3 (10g/l, H2O, 20℃)

Stability:

Stable. Incompatible with strong oxidizing agents.

CAS DataBase Reference

63451-35-4(CAS DataBase Reference)

EPA Substance Registry System

2,7-Naphthalenedisulfonic acid, 3-hydroxy-4-[(2-hydroxy-4-sulfo-1-naphthalenyl)azo]-, trisodium salt (63451-35-4)

Safety Information

Hazard Codes 

Xi

Risk Statements 

36/37/38

Safety Statements 

26-36

WGK Germany 

WGK 3 highly water endangering

HS Code 

2927 00 00

HYDROXYNAPHTHOL BLUE Usage And Synthesis

Chemical Properties

blue crystalline powder

Purification Methods

The crude material is treated with hot EtOH to remove soluble impurities, then dissolve in 20% aqueous MeOH and chromatographed on a cellulose powder column with propanol/EtOH/water (5:5:4) as eluent. The upper of three zones was eluted to give the pure dye which is precipitated as the monosodium salt trihydrate by adding conc HCl to the concentrated eluate [Ito & Ueno Analyst 95 583 1970]. It can be converted to the trisodium salt wih the calculated amount of alkali. Indigocarmine (2[1,3-dihydro-3-oxo-5-sulfo-2H -indol-2-ylidene]-2,3-dihydro-3-oxo-1H -

HYDROXYNAPHTHOL BLUE(63451-35-4)Related Product Information

• Acid Orange 7
• CROCEIN ORANGE G
• Naphthionic acid
• 2,2'-DIHYDROXYAZOBENZENE
• Acid Red 27
• 3-Hydroxynaphthalene-2,7-disulphonic acid
• Sodium 1-amine-2-naphthol-4-sulfonate
• Sodium 4-amino-1-naphthalenesulfonate
• Mordant Black 17
• Sudan I
• Sodium 6-hydroxynaphthalene-2-sulfonate
• HYDROXY NAPHTHOL BLUE
• 1-Amino-2-naphthol-4-sulfonic acid
• 1-Aminonaphthalene-6-sulfonic acid
• Disodium 2-naphthol-3,6-disulfonate
• ACID RED 88
• HYDROXYNAPHTHOL BLUE
• Food Yellow 3:1